How it is used: Both hallucinogens and dissociative drugs can be swallowed, injected or smoked. LSD liquid and gelatin forms can be put in the eyes. PCP is often sprinkled or sprayed on cigarettes, parsley and marijuana.

Duration of high: Hallucinogens: effects begin within 30 to 90 minutes and last from six to twelve hours. PCP: effects begin within minutes and last for hours.

In 2012, more than 180,000 Americans aged 12 and older reported current (past-month) use of LSD and 32,000 reported current use of PCP. The average age at first use was about 17 for PCP and 19 for LSD. (National Survey on Drug Use and Health, 2012)

There are hundreds of synthetic hallucinogens on the market today including 25I-NBOMe (N Bomb) and 2C-I (Smiles) which have been attributed to multiple deaths and significant injuries. They are generally found as powders, liquids, soaked into blotter paper or laced on something edible. Both drugs are classified as Schedule I substances, making possession, distribution and manufacture illegal.